基于LPC2124的超声波电机驱动控制系统

　　针对行波型超声波电机的驱动控制特性，为方便电机调试，实现电机的转速或位置信号检测，检测电机首次启动时的环境温度，设计了一款基于LPC2124的驱动控制系统。采用传统的推挽电路实现功率放大，串联电感进行谐振匹配。运用LPC2124内置的脉宽调制器和A/D转换器，外加微调电阻，可实时调节PWM频率，从而方便电机的调试。霍尔传感器ATS642LSH结合固定在电机转子上的环形齿轮，检测电机转速或位置。采用LM75温度传感器，检测环境温度，给电机的首次启动提供一个参考温度。试验表明，系统能顺利检测环境温度，能稳定、可靠地驱动电机工作，同时检测电机的转速或位置信号。

　　Abstract:

　　For the special driving and controlling features of traveling-wave type ultrasonic motor，to facilitate motor’s testing， to detect the speed or position of motor， to sense the temperature when first driving the motor， this paper designed a system based on LPC2124.A traditional push-pull circuit amplified power and series inductor resonated with motor.LPC2124’s pulse-width modulator and A/D converter with an adjustable resistor could modulate the frequency of PWM real time.Hall sensor ATS642LSH detected the speed or position with a ring gear fixed on the rotor.LM75 measured the environment temperature，and LPC2124 generated PWM signals according to the temperature，especially when first driving the motor.The experiment results show that the system could successfully measure the temperature，steadily and reliably drive motor，and detect speed or position singal.